Signal and noise characteristics of bi-SQUID

被引：23

作者：

Kornev, V. K. ^{[1
]}

Sharafiev, A. V. ^{[1
]}

Soloviev, I. I. ^{[1
]}

Mukhanov, O. A. ^{[2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Moscow 119991, Russia

[2] Hypres Inc, Elmsford, NY 10523 USA

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2014年 / 27卷 / 11期

关键词：

bi-SQUID; dc SQUID; signal characteristics; noise characteristics; arrays; numerical simulation; experimental evidence;

D O I：

10.1088/0953-2048/27/11/115009

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present an improved analytic theory, numerical simulation, and analysis of noise characteristics of a bi-SQUID in comparison with those of a dc SQUID in an open loop configuration. The analytic theory which had been developed earlier, neglecting a pulse component of the difference of the phases of Josephson junctions, is now completed taking into account the pulse component. In the bi-SQUID, the additional Josephson junction introduces another source of fluctuations and changes its transfer function, nonlinear dynamics, and the noise spectrum transformation. Some increase in the reduced-to-input noise at low values of applied magnetic flux comes from the nonlinear flux to phase difference transformation that was introduced in bi-SQUID as a way to linearize its voltage response.

引用

页数：9

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